A top donor to Donald Trump and other Maga Republicans has privately mocked the US president’s longtime position that he has an upper hand in trade negotiations with China, in a sign that even some loyal supporters have been uneasy with the White House strategy. The barb is significant because it was sent by an important political ally to Trump and his movement. Uline is a privately held company, and it is difficult to gauge the exact impact Trump’s tariff and other trade policies have on the office supply company. But people who spoke to the Guardian say Uline imports a significant amount of its merchandise from China and other parts of the world. Trump has touted the US as having an edge in negotiations with China as recently as last month.